| Popis: |
© IMCET 2022. All rights reserved.Collecting strength of xanthates, which are widely used in flotation of sulfides, varies depending on C-H chain lengths and structures. While the collecting strength increase with increasing chain length, the selectivity decreases. C-H chain structure, on the other hand, affects the adsorption of a collector to a mineral surface. Another important variable affecting flotation recoveries is the sizes and stabilities of air bubbles that carry hydrophobic minerals out of the flotation cell. In this study, the effects of xanthates with different chain length and structure (PEX and SIPX) on galena flotation recovery were investigated depending on collector concentration and pH. The effect of frother addition on the flotation recovery was also determined for both xanthates. The results showed that the flotation recoveries varied depending on pH, and the highest flotation recoveries were obtained under alkaline pHs. With the addition of frother, the size of the air bubbles decreased, so the meeting/collision probability between air bubbles and minerals, and thus the flotation recoveries increased. According to the results, the flotation recoveries increased for both xanthates with increasing frother amount, and the flotation recovery was higher with PEX having straight chain structure. However, with the use of frother, the increase in flotation recoveries with SIPX having branched chain was higher than that of obtained with PEX. |
